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CachingIterator::hasNext

(PHP 5, PHP 7, PHP 8)

CachingIterator::hasNext — Check whether the inner iterator has a valid next element

说明

public CachingIterator::hasNext(): bool

警告

本函数还未编写文档，仅有参数列表。

参数

此函数没有参数。

返回值

成功时返回 true，或者在失败时返回 false。

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User Contributed Notes 1 note

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andresdzphp at php dot net ¶

12 years ago

CachingIterator::hasNext Example

<?php
$ait = new ArrayIterator(array('Value 1', 'Value 2', 'Value 3', 'Value 4'));
$cit = new CachingIterator($ait);

foreach ($cit as $value) {
    echo $value;
    //if has a next value, print a comma
    if ($cit->hasNext()) {
        echo ', ';
    }
}
?>

Result: Value 1, Value 2, Value 3, Value 4

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